用JavaScript判断IE版本号

记事本 2011-05-17 09:01:23 浏览 2,962 次

标签版本号

网上抄来的，找不到原文链接了。望告知。

// ---------------------------------------------------------- 
// A short snippet for detecting versions of IE in JavaScript 
// without resorting to user-agent sniffing 
// ---------------------------------------------------------- 
// If you're not in IE (or IE version is less than 5) then: 
//     ie === undefined 
// If you're in IE (>=5) then you can determine which version: 
//     ie === 7; // IE7 
// Thus, to detect IE: 
//     if (ie) {} 
// And to detect the version: 
//     ie === 6 // IE6 
//     ie > 7 // IE8, IE9 ... 
//     ie < 9 // Anything less than IE9 
// ---------------------------------------------------------- 
  
// UPDATE: Now using Live NodeList idea from @jdalton 
  
var ie = (function(){  
  
    var undef, 
        v = 3, 
        div = document.createElement('div'), 
        all = div.getElementsByTagName('i'); 
  
    while ( 
        div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->', 
        all[0] 
    ); 
  
    return v > 4 ? v : undef;  
  
}());

用JavaScript判断IE版本号

建议继续学习